Add missing section symbol to COFF's .debug_types.dwo.

Should bring the cygwin bots back.

I added a triple to the test that was failing so that it would have failed
on Linux.

llvm-svn: 231882
diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index 6370203..ec1d4ba 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -651,7 +651,7 @@
       ".debug_types.dwo",
       COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
           COFF::IMAGE_SCN_MEM_READ,
-      SectionKind::getMetadata());
+      SectionKind::getMetadata(), "section_types_dwo");
   DwarfAbbrevDWOSection = Ctx->getCOFFSection(
       ".debug_abbrev.dwo",
       COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |